For nurses Kristin Sollars and Marci Ebberts, work is more than just a job.
"Don't you feel like you're a nurse everywhere you go?" Sollars, 41, asked Ebberts, 46, on a visit to StoryCorps in May.
"I mean, let's be honest, every time we get on a plane you're like, E6 didn't look good to me. Keep an eye out there."
Sollars and Ebberts have grown so close while working together that they've come to call themselves "work wives." They first met in 2007, working side by side in the intensive care unit at Saint Luke's Hospital in Kansas City, Mo.